Question

What happens when –

a) copper reacts with dil. Hydrochloric Acid?

b) Iron reacts with dil. Sulphuric Acid?

c) Aluminium reacts with dil. Hydrochloric Acid?​

Answer 1

(a) There will be no reaction. Copper is a very unreactive metal, and it does not react with hydrochloric acid.  Hydrogen is above copper in reactivity series, so copper cannot replace the hydrogen in HCl to form CuCl₂ .

(b) When iron reacts with dilute sulphuric acid, it forms iron sulphate and hydrogen gas.

$Fe+H_2SO_4---->FeSO_4+H_2$

(c) Aluminium reacts with dilute hydrochloric acid to give aluminium chloride and hydrogen gas.  

$2Al + 6HCl----> 2AlCl_3 + 3H_2$